摘要
在一台电控共轨柴油机上,进行了基于可变涡轮截面增压器(VGT)控制的废气再循环(EGR)对柴油机燃烧、性能和排放影响的试验研究。系统研究了VGT开度、EGR率和喷油参数对柴油机性能和排放的影响。研究表明,采用基于VGT控制的EGR系统,调整VGT叶片位置,可以改变EGR率,实现最高43.2%的EGR率,从而有效地降低NOx;在调整优化喷油参数后,柴油机的排放有了很大的改善,烟度有较大幅度的降低,经过优化,气体排放可满足国Ⅳ排放法规的要求,十三工况加权当量比油耗比原国Ⅲ柴油机降低了4.2%,但是,采用EGR方案缸内最大爆发压力明显增大。
A VGT turbocharger was applied to an electronic control common rail diesel engine to investigate the impact of VGT, EGR and injection parameters on diesel engine combustion, performance and emission. The result showed that ： applying the EGR system based on VGT, the change of VGT vane position can effectively affect EGR ratio, and could realize the highest 43.2% EGR ratio in some conditions, which can effectively reduce NOx emission. Combined with optimized injection parameters, the engine＇ s emissions have greatly improved, PM emission was declined markedly, NOx emission declined to 3. 583 g/ （ kW · h）, and the 13 conditions＇ fuel consumption is 4.2% lower than State Ⅲ level.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2009年第2期109-115,共7页
Transactions of Csice
基金
国家863计划资助项目(2006AA110113)
